78267731073 has 16 divisors (see below), whose sum is σ = 125542225920. Its totient is φ = 42370500816.

The previous prime is 78267731063. The next prime is 78267731083. The reversal of 78267731073 is 37013776287.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78267731063) and next prime (78267731083).

It is not a de Polignac number, because 78267731073 - 2¹³ = 78267722881 is a prime.

It is a super-2 number, since 2×78267731073² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78267731023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98079465 + ... + 98080262.

It is an arithmetic number, because the mean of its divisors is an integer number (7846389120).

Almost surely, 2^78267731073 is an apocalyptic number.

It is an amenable number.

78267731073 is a deficient number, since it is larger than the sum of its proper divisors (47274494847).

78267731073 is a wasteful number, since it uses less digits than its factorization.

78267731073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196159756.

The product of its (nonzero) digits is 2074464, while the sum is 51.

The spelling of 78267731073 in words is "seventy-eight billion, two hundred sixty-seven million, seven hundred thirty-one thousand, seventy-three".